JPS6216766B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a piston ring processing device, and more particularly to a cutting device for cutting out a joint from a substantially elliptical piston ring material.

A piston ring is a ring with a gap (notch) that becomes a perfect circle when the gap is closed, and it must generate a certain amount of surface pressure on the outside, so it is processed into a roughly oval cam-shaped material. After that, the abutment part is cut off.

In this case, when the piston ring is closed, the openings need to overlap without any gaps, so the cutting device also requires special conditions. A milling machine as shown in FIG. 2, which is a partially enlarged front view, was used.

That is, a plurality of piston rings 8 are aligned and the jig 8 is
Tighten it to 5. The jig 85 is set on the tailstock 95, and the groove 96 of the jig 85 is combined with the rotating pawl 97 so that the jig 85 can be rotated left and right about the center of the piston ring 8. Furthermore, this tailstock 95,
The table 98 to which the piston ring 8 is attached is moved in the axial direction of the piston ring, and the abutments 81 and 82 are cut by the milling cutter 3. On the other hand, if you simply rotate the piston ring 8 left and right,
Since the cross section cut by the milling cutter is not cut at right angles to the outer periphery of the piston ring, the milling cutter 3 is also moved forward and backward as shown in FIG. 2 at the same time as the piston ring rotates left and right.

Therefore, the piston ring 8 set in the state shown in FIG. 1 is placed on the table 98 in the state shown by the solid line in FIG.
advance and retreat to cut the left abutment 81 and return to the state shown in Fig. 1, then to the state shown by the imaginary line in Fig. 2 (rotate the piston ring counterclockwise and retract the milling cutter).
The table 98 is moved forward and backward to cut the right abutment 82 and release the abutment.

In the case of such conventional devices, it is not only necessary to adjust the left and right rotation angle, the height of the milling cutter, and the amount of back and forth movement depending on the diameter of the piston ring and the size of the abutment, but also to adjust the normal right angle adjustment. For example, it is impossible to cut away the joints of multiple piston rings that form a taper joint other than the opening, so each piston ring with a taper joint is cut with a milling cutter that is inclined at a certain angle with respect to the axis of the piston ring. It was machined using a milling machine as shown in FIG. Therefore, it is impossible to machine piston rings with a right-angle opening and a taper opening on the same line, and machining of piston rings with a tapered opening can only be done one by one, which takes a lot of time. There were some problems.

The present invention solves the problems of such conventional piston ring cutting devices, and can easily accommodate changes in piston ring diameter and aperture size, and can simultaneously cut multiple piston rings. To obtain a piston ring cutting device which can be machined and can simultaneously machine a plurality of piston rings of either right angle or tapered abutment.

Embodiments of the present invention will be shown in FIG. 3 and subsequent figures, and will be described in detail.

First, the gist of the present invention consists of the following five configurations as described in the claims.

1. Having a milling cutter 3 rotated by a rotating shaft 30.

2. The table 1 has the piston ring 8 arranged on the table surface 14.

3. The table 1 has a clamping means 2 for the piston ring 8 and a rotating means 5 for the table.

4. The table 1 has a feeding means 7 for moving the table 1 parallel to the table surface 14 and perpendicular to the milling rotation axis 30.

5. To attach the piston ring on the table surface 14 with the center 80 of the piston ring 8 eccentric to the rotating table axis of the table 1.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure and operation of the piston ring cutting device of the present invention having the above-mentioned features will be described in detail below with reference to the drawings.

FIG. 3 shows an embodiment of the present invention,
4 is a front view of FIG. 3, and FIG. 5 is an enlarged sectional view of the table portion.

First, as shown in FIGS. 3 and 4, the base 9 of the device
In this embodiment, a cylindrical table 1 movable by a feeding means 7 using a feeding cylinder 70 is assembled, and a piston ring 8 is arranged on the table surface 14. Further, the table 1 is rotatable by a rotating means 5, and a clamper 28 for clamping the piston ring 8 is attached. On the other hand, a milling cutter 3 rotated by a motor 38 is mounted on the base 9 and supported by a milling rotation shaft 30 and a headstock 32.

As shown in FIG. 5, the structure of the table 1 includes a clamping means 2 coupled to a clamper 28 for clamping the piston ring 8. The clamping means is constituted by a clamp cylinder 20 and a piston 21 as shown in the figure from the viewpoint of responsiveness and mechanism, and fluid injection holes are provided in the working chambers 24 and 25 of the cylinders. Further, a pin 22 fixed to the table 1 is fitted into the clamper 28 at the rotation center position of the table 1. On the other hand, the table 1 is rotatably coupled to a table substrate 11 via a metal 12.
As shown in FIG. 3, the table 1 is rotated by moving the arm 13 provided on the table.
For reasons such as responsiveness, this rotating means 5 is preferably achieved by reciprocating a rotating cylinder 50 and a piston 51, and the rotation angle is adjusted by stoppers 52 and 53. Further, when the table 1 rotates to the right or left and is at a predetermined processing position, it is desirable to provide a locking means 4 within the table 1 as a means for fixing the rotational position of the table 1. In the embodiment, the locking means is a lock cylinder. 40 and a piston 41,
By injecting fluid, the pressure plate 4 at the tip of the piston 41
5 and the table substrate 11 are brought into pressure contact and rotationally fixed.

Next, FIG. 6 shows the processing state of the piston ring in the piston ring cutting device of the present invention, where the solid line shows the case where the right abutment 82 is machined, and the dashed-dotted line shows the case where the left abutment 81 is machined. . With the piston ring 8 on the table surface 14 clamped by the clamping means 2, it is rotated to the left by the rotating means 5 and the rotational position is fixed by the locking means. The right abutment 82 is cut by the milling cutter 3 while advancing in a direction parallel to the surface and perpendicular to the milling cutter rotation axis 30 . After cutting is completed, the table 1 is returned to the direction of the arrow X by the feeding means 7, the locking means 4 is released, the table 1 is rotated clockwise by the rotating means 5, the rotational position is fixed again, and the table is advanced in the direction of the arrow The left abutment of the piston ring 8 is cut using a milling cutter 30 as shown in the figure. In this case,
Since the center 80 of the piston ring 8 and the table axis center 10 of the table 1 are eccentric, the milling cutter 3 and piston ring 8 are
The outer periphery forms a right angle, and highly accurate machining can be performed by simply rotating the table 1 while the milling cutter 3 remains in a fixed position. The eccentricity between the piston ring 8 and the center of the table 1 is as shown in FIG.
It is determined by making the curvature center position 84 of the left and right abutments 81 and 82 correspond to the axial center 10 position of the table 1.

Furthermore, in the present invention, as shown in FIGS. 3 and 4, the milling cutter 3 is assembled to a rotary plate 6 rotating around a rotary plate shaft 60,
A milling power motor 38 is attached to the rotating plate 6, and the milling rotating shaft main base 32 is connected to the rotating plate 6 via a belt 34.
Transmit power to. On the other hand, the rotary plate 6 is rotated about a shaft 60 by a device not shown, and can be determined at a predetermined angle as shown in FIG. In this case milling cutter 3
is located on the rotary plate shaft 60, and the height of the table surface 14 is such that the center of the milling cutter 3 is the center of the group of piston rings 8. Therefore, by processing the piston ring 8 with the apparatus of the present invention as shown in FIG. 7, a piston ring having a desired taper opening can be processed.
If 0 is made horizontal, a right-angled aperture piston ring can also be machined.

In particular, when machining multiple taper piston rings at the same time, as shown in FIG. processed. That is, since the cutting position of the second piston ring 8' is different from the first piston ring 8 by 1, which is the cutting deviation between the upper surface and the lower surface of the taper abutment, the piston ring centers 80, 80' are shifted by 1. For example, the first and second piston rings are machined into exactly the same shape, and a plurality of piston rings can be machined at the same time. Also, in this case, positioning jig 1
7 is used to facilitate the installation of the piston rings.

In addition, when installing the positioning jig 17 on the table surface 14 of the piston ring 8, it is prepared according to the diameter of the piston ring, the size of the abutment, etc., and when machining various types of piston rings, this It can be applied to all types of piston ring joint machining by simply replacing the jig and adjusting the rotation angle of the table, and especially for tapered joints, by adjusting the rotation of the rotary plate. be.

As described above, the piston ring cutting device of the present invention can easily accommodate changes in the piston ring diameter and aperture size, and can also simultaneously cut multiple piston rings with tapered apertures. Not only can it be machined, but both piston rings, including right-angled and tapered joints, can be machined using the same machine, resulting in extremely high productivity.

In the embodiment, a fluid pressure mechanism was used for the rotation means, feeding means, etc., but it is also possible to use a mechanical type, and it is possible to use either a vertical or horizontal type depending on the installation conditions. Not even.

[Brief explanation of the drawing]

Figures 1 and 2: Front view and enlarged side view of a conventional cutting device; Figure 3: A plan view of an embodiment of the cutting device of the present invention; Figure 4: a front view of Figure 3; Figure 5: Fig. 4 is a partially enlarged cross-sectional view, Fig. 6, Fig. 7: Fig. 8 shows the processing state of the cutting device of the present invention, Fig. 8: A diagram showing another embodiment of the present invention, Fig. 9: Fig. 9: the present invention. The figure which shows the other processing state of. Explanation of the numbers, 1...table, 10...table axis center, 2...clamp means, 20...clamp cylinder, 28...clamper, 3...milling cutter, 30...milling shaft, 4...locking means , 4
0... Lock cylinder, 5... Rotating means, 50...
...Rotating cylinder, 6... Rotating plate, 60... Rotating plate shaft, 7... Feeding means, 70... Feeding cylinder, 8
... Piston ring, 80 ... Piston ring center, 81, 82 ... Joint.

Claims (1)

[Scope of Claims] 1. A piston ring cutting device for cutting off the abutment of a substantially elliptical piston ring material using a milling machine, which has a milling cutter 3 rotated by a rotating shaft 30, and has a piston ring cutter on a table surface 14. It has a table 1 on which a ring 8 is arranged, and the table 1 includes a clamping means 2 for the piston ring 8, a table rotation means 5, and a feeding means for moving the table 1 in a direction parallel to the table surface and perpendicular to the milling rotation axis. 7, and an axial center 10 of the table axis located at the rotation center of the table 1 and perpendicular to the horizontal base 9.
In contrast, this piston ring cutting device is characterized in that the piston ring 8 is mounted on the table surface 14 with the center 80 of the piston ring 8 being eccentric. 2. The rotary shaft 30 of the milling cutter 3 is parallel to the milling cutter 3 and is assembled to a rotatable rotary plate 6, and the axis 60 of the rotary plate and the table axis are perpendicular to each other. The piston ring cutting device according to item 1. 3. The clamping means 2, the table rotation means 5, and the feeding means 7 are respectively a clamp cylinder 20, a rotating cylinder 50, and a feeding cylinder 70, and the table 1 is further provided with a locking means 4 for fixing the rotational position. A piston ring cutting device according to claim 1. 4 A plurality of piston rings 8 are attached on the surface of the table 1, and the milling cutter 3 is assembled at an angle to the table axis, and the piston rings 8 are attached in an overlapping manner with the position of the piston rings 8 shifted in a direction perpendicular to the moving direction of the table 1. The piston ring cutting device according to claim 1, characterized in that: